I'm taking on Cancer Research UK's Tough 10 - a brand new series of epic 10k runs over some of the UK's toughest terrain. At Roundhay Park I'll be trying to stay on my feet as I conquer a 10k course consisting of steep muddy trails and streams. 1 in 2 people born after 1960 will be diagnosed with some form of cancer in their lifetime. So dig deep, and help Cancer Research UK scientists take on their toughest challenge yet - to beat cancer sooner.